Bitspower Mos Block for GIGABYTE C621 Aorus Xtreme
The important components of your motherboards deserve to receive the best heat management possible, which is why Bitspower expertly designed the GIGABYTE C621 Aorus Xtreme Mos Block to simultaneously cool the VRMs. 
Made of clear acrylic, the top layer of the mos block offers not only an efficient water channel design, but also a unique look to complement your PC style, while the base layer is made of high quality copper and molded to tightly fit over the VRMs, offering the best heat transfer possible.
Additionally, the Bitspower Mos Block for GIGABYTE C621 Aorus Xtreme is equipped with Bitspower Digital RGB LEDs, the mos block is sure to become the center piece of your rig with its easy to control light effects.

Recommended purchases: Bitspower Summit CPU Block for Socket LGA 3647 (Narrow)
https://shop.bitspower.com/index.php?route=product/product&product_id=6851 

Dimension (LxWxH) : 313 x 37 x 23.8 mm

LED Color: Digital RGB
LED Strip Management By Bitspower Digital RGB And Certified By ASUS AURA Sync, GIGABYTE RGB Fusion, MSI Mystic Light Sync, ASRock Polychrome and Razer Chroma

Included :
1set of Thermal PAD
1set of Mounting Screws/Accessories

Compatibility :
GIGABYTE C621 Aorus Xtreme

If there aren’t enough DRGB headers on the motherboard, you can use the "Bitspower Digital RGB Multi Function Controller", which is available for purchase via the link below:
https://shop.bitspower.com/index.php?route=product/product&product_id=7044

I wanna show off, but what's the support I'd need?
◆RGB

The end of Power supply is 4PIN.The sequence is +/G/R/B (some motherboards are shown +12V/G/R/B). Please plug in the corresponding direction of motherboard, controller or the wire integrator for one to many. If choosing the motherboard as the power supply, the light effect can be synchronize with MB.

◆DRGB

The end of power supply is 3PIN. The sequence is +/D/↓ (some motherboards are shown +5V/D/↓, and the plug is like 4PIN but the 3rd PIN is empty). Please plug in the corresponding direction of motherboard, controller or the wire integrator for one to many. If choosing the motherboard as the power supply, the light effect can be synchronize with MB.